Mike and Jack work in the same factory.They have the same hobby:swimming.Tomorrow is a holiday,so
题目
Mike and Jack work in the same factory.They have the same hobby:swimming.Tomorrow is a holiday,so
they want to go s______.It is seven o'clock in the evening.They are w_____the weather news.The w________report says:it wil be fine tomorrow.Mike and Jack are very h____to hear that.They are going to swim at about seven'clock.
答案
swimming; watching; weather; happy
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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